2009 TOYOTA SIENNA 3.5 FRT AND REAR AIR, NO WARM AIR FROM HEATER,

What is your question?

COOLANT SYS OK AT THIS TIME, WATER PUMP, THERMOSTAT OK, SYS FULL OF COOLANT, AT FIRST HEATER WORK AT FREEWAY SPEEDS. NOW DONT WORK AT ALL. HERE NOISE AT CENTER BOTTOM OF DASH. PULLED COVERS, NO SIGNS OF BROKEN OR DISCONNECTED ITEMS, VEHICLE HAS OVER HEATED, HAD BAD RADIATOR CAP, REPLACED AND THERMDSTAT WAS REPLACED AS WELL. UPPER HEATER HOSE HOT. LOWER HOSE COOL. LIKE COOLANT GOING IN, BUT NOT COMING OUT. HELP

What makes this problem better or worse?

NOTHING

How long has your 2009 Toyota Sienna had this problem?

COUPLE OF MONTHS, NO HEAT FROM FRONT OR BACK UNTIL FREEWAY, BUT NOW NOT EVENFREEWAY